Hi,
I had a similar case with checkbox rendered in the dataGrid. I think similar logic may work with this case as well
Code:
<mx:Script>
<![CDATA[
[Bindable] public var enableDisable:Boolean = false;
//here u can have your own logic to alter the
// value of this variable "enableDisable"
]]>
</mx:Script>
<mx:DataGrid id="dgList">
<mx:columns>
<mx:DataGridColumn headerText="Tab Name" dataField="tabName" width="200"/>
<mx:DataGridColumn headerText="Add" dataField="addStatus" width="50">
<mx:itemRenderer>
<mx:Component >
<mx:HBox>
<mx:CheckBox enabled = "{outerDocument.enableDisable}" click="data.addStatus=!data.addStatus" selected="data.addStatus}"/>
</mx:HBox>
</mx:Component>
</mx:itemRenderer>
</mx:DataGridColumn>
</mx:DataGrid>
regards,
bidur